Figure 28
A simplified, diagrammatic representation of the efferent autonomic innervation of the heart.

The parasympathetic and sympathetic nerves to the heart, many of which closely accompany each other in and through the various cardiac and coronary plexuses, have been separated for illustrative purposes. (Diagram by McClaren Johnson Jr., M.D.)

B.F. Waller and R.C. Schlant: Anatomy of the Heart: Hurst's The Heart, 8th ed, p 85.